Fix czishrink build by completely disabling roll-forward in global.json

[m-ringler]

Description

• Print the dotnet version that is used to build czishrink.
• Change the roll-forward value in global.json to "disable", cf. https://learn.microsoft.com/en-us/dotnet/core/tools/global-json#rollforward

Fixes broken build

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

PR build.

Checklist

• I followed the Contributing Guidelines.
• I did a self-review.
• I commented my code, particularly in hard-to-understand areas.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.03%. Comparing base (953017f) to head (f6871c2).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #77   +/-   ##
=======================================
  Coverage   78.03%   78.03%           
=======================================
  Files          59       59           
  Lines        1917     1917           
  Branches      120      120           
=======================================
  Hits         1496     1496           
  Misses        397      397           
  Partials       24       24           

Components	Coverage Δ
czicompress	66.75% <ø> (ø)
czishrink	80.84% <ø> (ø)

[DaveyJonesBitPail]

Why does roll-forward break the build here? Is it related to our package locks when updating w/ dependabot?